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[RFC PATCH 15/17] hw/sd: Add mmc switch function support
From: |
Cédric Le Goater |
Subject: |
[RFC PATCH 15/17] hw/sd: Add mmc switch function support |
Date: |
Fri, 18 Mar 2022 14:28:22 +0100 |
From: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
switch operation in mmc cards, updated the ext_csd register to
request changes in card operations. Here we implement similar
sequence but requests are mostly dummy and make no change.
Implement SWITCH_ERROR if the write operation offset goes beyond length
of ext_csd.
Signed-off-by: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
[ clg: - ported on aspeed-7.0 patchset ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
hw/sd/sd.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 52 insertions(+)
diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 3a3b9d62e1ba..d3bda6c2aa6b 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -538,6 +538,7 @@ static void sd_set_rca(SDState *sd)
FIELD(CSR, AKE_SEQ_ERROR, 3, 1)
FIELD(CSR, APP_CMD, 5, 1)
FIELD(CSR, FX_EVENT, 6, 1)
+FIELD(CSR, SWITCH_ERROR, 7, 1)
FIELD(CSR, READY_FOR_DATA, 8, 1)
FIELD(CSR, CURRENT_STATE, 9, 4)
FIELD(CSR, ERASE_RESET, 13, 1)
@@ -935,6 +936,43 @@ static uint32_t sd_wpbits(SDState *sd, uint64_t addr)
return ret;
}
+enum {
+ MMC_CMD6_ACCESS_COMMAND_SET = 0,
+ MMC_CMD6_ACCESS_SET_BITS,
+ MMC_CMD6_ACCESS_CLEAR_BITS,
+ MMC_CMD6_ACCESS_WRITE_BYTE,
+};
+
+static void mmc_function_switch(SDState *sd, uint32_t arg)
+{
+ uint32_t access = extract32(arg, 24, 2);
+ uint32_t index = extract32(arg, 16, 8);
+ uint32_t value = extract32(arg, 8, 8);
+ uint8_t b = sd->ext_csd[index];
+
+ switch (access) {
+ case MMC_CMD6_ACCESS_COMMAND_SET:
+ qemu_log_mask(LOG_UNIMP, "MMC Command set switching not supported\n");
+ return;
+ case MMC_CMD6_ACCESS_SET_BITS:
+ b |= value;
+ break;
+ case MMC_CMD6_ACCESS_CLEAR_BITS:
+ b &= ~value;
+ break;
+ case MMC_CMD6_ACCESS_WRITE_BYTE:
+ b = value;
+ break;
+ }
+
+ if (index >= 192) {
+ sd->card_status |= R_CSR_SWITCH_ERROR_MASK;
+ return;
+ }
+
+ sd->ext_csd[index] = b;
+}
+
static void sd_function_switch(SDState *sd, uint32_t arg)
{
int i, mode, new_func;
@@ -2340,6 +2378,19 @@ static sd_rsp_type_t
sd_emmc_cmd_SEND_TUNING_BLOCK(SDState *sd, SDRequest req)
return sd_r1;
}
+static sd_rsp_type_t sd_emmc_cmd_SWITCH_FUNCTION(SDState *sd, SDRequest req)
+{
+ switch (sd->state) {
+ case sd_transfer_state:
+ sd->state = sd_programming_state;
+ mmc_function_switch(sd, req.arg);
+ sd->state = sd_transfer_state;
+ return sd_r1b;
+ default:
+ return sd_invalid_state_for_cmd(sd, req);
+ }
+}
+
static const SDProto sd_proto_emmc = {
.name = "eMMC",
.cmd = {
@@ -2348,6 +2399,7 @@ static const SDProto sd_proto_emmc = {
[2] = sd_emmc_cmd_ALL_SEND_CID,
[3] = sd_emmc_cmd_SEND_RELATIVE_ADDR,
[5] = sd_cmd_illegal,
+ [6] = sd_emmc_cmd_SWITCH_FUNCTION,
[8] = sd_emmc_cmd_SEND_EXT_CSD,
[19] = sd_cmd_SEND_TUNING_BLOCK,
[21] = sd_emmc_cmd_SEND_TUNING_BLOCK,
--
2.34.1
- [RFC PATCH 06/17] hw/sd: Add sd_cmd_GO_IDLE_STATE() handler, (continued)
- [RFC PATCH 06/17] hw/sd: Add sd_cmd_GO_IDLE_STATE() handler, Cédric Le Goater, 2022/03/18
- [RFC PATCH 04/17] hw/sd: Add sd_cmd_illegal() handler, Cédric Le Goater, 2022/03/18
- [RFC PATCH 14/17] hw/sd: Add CMD21 tuning sequence, Cédric Le Goater, 2022/03/18
- [RFC PATCH 05/17] hw/sd: Add sd_cmd_unimplemented() handler, Cédric Le Goater, 2022/03/18
- [RFC PATCH 13/17] hw/sd: Update CMD1 definition for MMC, Cédric Le Goater, 2022/03/18
- [RFC PATCH 11/17] hw/sd: Add eMMC support, Cédric Le Goater, 2022/03/18
- [RFC PATCH 07/17] hw/sd: Add sd_cmd_SEND_OP_CMD() handler, Cédric Le Goater, 2022/03/18
- [RFC PATCH 10/17] hw/sd: Add sd_cmd_SEND_TUNING_BLOCK() handler, Cédric Le Goater, 2022/03/18
- [RFC PATCH 03/17] hw/sd: Introduce sd_cmd_handler type, Cédric Le Goater, 2022/03/18
- [RFC PATCH 16/17] hw/sd: Support boot area in emmc image, Cédric Le Goater, 2022/03/18
- [RFC PATCH 15/17] hw/sd: Add mmc switch function support,
Cédric Le Goater <=
- [RFC PATCH 08/17] hw/sd: Add sd_cmd_ALL_SEND_CID() handler, Cédric Le Goater, 2022/03/18
- [RFC PATCH 09/17] hw/sd: Add sd_cmd_SEND_RELATIVE_ADDR() handler, Cédric Le Goater, 2022/03/18